Java程序设计制作拼图游戏

Java程序设计实例：制作拼图游戏本例知识点一句话讲解新学知识使用Image类导入图片使用MouseEvent类处理鼠标事件已学知识使用Point类转换坐标使用Graphics类管理屏幕显示一、练习具体要求本练习制作拼图游戏，运行效果如图99-1所示。执行本实例后，用鼠标拖动选中的小图片进行拼接，可以拼成一幅完整的图片。本实例的知识点有：鼠标事件的监听，Graphics类和Image类的应用。二、程序及注释（1）编程思路：本练习因为要制作拼图游戏，所以首先要实现图片的导入。这是通过getImage()函数来实现的，该函数有两个参数，第一个参数指明图片的路径，第二个参数指明图片的名称。然后，因为要实现图片摆放的随意性，所以要通过initgame()函数来实现。Initgame()函数是自写函数，在函数体内，通过调用Math.random()函数产生随机数，用来达到图片位置摆放的随意性和随机性。最后，因为要实现人机交互.，所以首先要通过一系列函数来实现对鼠标事件的监听和响应，这是通过函数addMouseListener(this)和addMouseMotionListener(this)来完成的。这样程序会区分用户对鼠标不同的操作，正确执行相应的功能。(2)程序实现及注释：importjava.awt.*;importjava.applet.*;importjava.awt.event.*;publicclasspintuextendsApplet implementsMouseListener,MouseMotionListener{ privateImagepicture; privateGraphicsbuffer; privateImagepic[]; privateImageoff_pic[]; privateGraphicsoff_buf[]; privateImageoff_screen; privateGraphicsoff_buffer; privateImageoff_drag; privateGraphicsoff_drag_buf; privateintmap[][]; privateintran[]; privateintwidth=0; privateintheight=0; privateintlastx; privateintlasty; privateintlast_downx; privateintlast_downy; privateintstepx; privateintstepy; privatebooleanchoose; privatebooleanclick[][]; privatebooleanm_down; privatebooleanm_drag; privatebooleannot_redraw; privatebooleanable; Fontfont1,font2; //程序的初始化 publicvoidinit() { resize(640,480); pic=newImage[3]; off_pic=newImage[16]; off_buf=newGraphics[16]; map=newint[4][4]; ran=newint[15]; for(inta=0;a<16;a++) map[a/4][a%4]=a; for(inta=0;a<15;a++) ran[a]=a; click=newboolean[4][4]; MediaTrackertracker=newMediaTracker(this); //要载入的图片 pic[0]=getImage(getCodeBase(),"PICTURE0.JPG"); pic[1]=getImage(getCodeBase(),"PICTURE1.JPG"); pic[2]=getImage(getCodeBase(),"PICTURE2.GIF"); tracker.addImage(pic[0],0); tracker.addImage(pic[1],0); tracker.addImage(pic[2],0); try{ tracker.waitForID(0); }catch(InterruptedExceptione){} //设置字体 font1=newFont("TimesRoman",Font.BOLD,48); font2=newFont("TimesRoman",Font.BOLD,32); width=640; height=480; //初始化主界面 initForm(); //添加鼠标监听事件 addMouseListener(this); addMouseMotionListener(this); } //面板初始化 voidinitForm() { this.setBackground(Color.orange); if(off_drag==null){ off_drag=createImage(width/4,height/4); off_drag_buf=off_drag.getGraphics(); } } publicvoidpaint(Graphicsg){ if(off_screen==null) { off_screen=createImage(width,height); off_buffer=off_screen.getGraphics(); } if(able){ off_buffer.setColor(Color.black); for(inta=0;a<4;a++) for(intb=0;b<4;b++) { if(map[a][b]!=15) off_buffer.drawImage(off_pic[map[a][b]],b*width/4,a*height/4,this); if(map[a][b]==15) off_buffer.fillRect(b*width/4,a*height/4,width/4,height/4); for(intc=0;c<2;c++) off_buffer.drawRect(b*width/4+c,a*height/4+c,width/4-c,height/4-c); if(click[a][b]) { off_buffer.setColor(Color.red); for(intd=0;d<2;d++) off_buffer.drawOval(b*width/4-d,a*height/4-d,width/4+d,height/4+d); off_buffer.setColor(Color.black); } } } else{ off_buffer.setColor(Color.orange); off_buffer.fillRect(0,0,640,480); off_buffer.setFont(font1); off_buffer.setColor(Color.red); off_buffer.drawImage(pic[2],30,50,250,180,this); off_buffer.drawImage(pic[0],370,160,250,180,this); off_buffer.drawImage(pic[1],60,270,250,180,this); off_buffer.drawString("ChooseOne!",320,100); } g.drawImage(off_screen,0,0,this); } publicvoidrepaint(){ paint(this.getGraphics()); } //单击鼠标时产生的事件 publicvoidmouseClicked(MouseEventevt){} //鼠标进入某个区域时产生的事件 publicvoidmouseEntered(MouseEventevt){} //鼠标退出某个区域时产生的事件 publicvoidmouseExited(MouseEventevt){} //移动鼠标时产生的事件 publicvoidmouseMoved(MouseEventevt){ if(!able){ Pointpoint; point=evt.getPoint(); if(point.x>30&&point.x<280&&point.y>50&&point.y<230) { off_buffer.setColor(Color.orange); off_buffer.fillRect(0,0,640,480); off_buffer.setFont(font1); off_buffer.drawImage(pic[2],25,45,250,180,this); off_buffer.drawImage(pic[0],370,160,250,180,this); off_buffer.drawImage(pic[1],60,270,250,180,this); off_buffer.setColor(Color.black); off_buffer.fillRect(30,225,250,5); off_buffer.fillRect(275,50,5,176); off_buffer.setColor(Color.red); off_buffer.drawString("picture2!",320,100); this.getGraphics().drawImage(off_screen,0,0,this); } elseif(point.x>370&&point.x<620&&point.y>160&&point.y<340) { off_buffer.setColor(Color.orange); off_buffer.fillRect(0,0,640,480); off_buffer.setFont(font1); off_buffer.drawImage(pic[2],30,50,250,180,this); off_buffer.drawImage(pic[0],365,155,250,180,this); off_buffer.drawImage(pic[1],60,270,250,180,this); off_buffer.setColor(Color.black); off_buffer.fillRect(370,335,250,5); off_buffer.fillRect(615,160,5,175); off_buffer.setColor(Color.red); off_buffer.drawString("picture0!",320,100); this.getGraphics().drawImage(off_screen,0,0,this); } elseif(point.x>60&&point.x<310&&point.y>270&&point.y<450) { off_buffer.setColor(Color.orange); off_buffer.fillRect(0,0,640,480); off_buffer.setFont(font1); off_buffer.drawImage(pic[2],30,50,250,180,this); off_buffer.drawImage(pic[0],370,160,250,180,this); off_buffer.drawImage(pic[1],55,265,250,180,this); off_buffer.setColor(Color.black); off_buffer.fillRect(60,445,250,5); off_buffer.fillRect(305,270,5,175); off_buffer.setColor(Color.red); off_buffer.drawString("picture1!",320,100); this.getGraphics().drawImage(off_screen,0,0,this); } else{ repaint(); } } } //拖动鼠标时产生的事件 publicvoidmouseDragged(MouseEventevt){ if(!able) return; if(m_down){ Pointpoint; Pointtemp; point=evt.getPoint(); m_drag=true; repaint(); Graphicsdavid=this.getGraphics(); if(!not_redraw) off_drag_buf.drawImage(off_pic[map[last_downy][last_downx]],0,0,this); david.drawImage(off_drag,point.x+stepx,point.y+stepy,this); not_redraw=true; } } //按下鼠标时产生的事件 publicvoidmousePressed(MouseEventevt){ if(!able) return; Pointpoint; Pointtemp; point=evt.getPoint(); if(getarea(point)==point) return; else{ temp=getarea(point); if(!m_down){ if(map[temp.y][temp.x]==15) return; else{ m_down=true; last_downx=temp.x; last_downy=temp.y; stepx=temp.x*160-point.x; stepy=temp.y*120-point.y; } } elseif(m_down){ m_down=false; } } } //放开鼠标时产生的事件 publicvoidmouseReleased(MouseEventevt){ if(able){ if(m_drag){ m_down=false;m_drag=false;not_redraw=false; Pointpoint; Pointtemp; point=evt.getPoint(); if(getarea(point)==point) { repaint(); return;} else{ temp=getarea(point); if(map[temp.y][temp.x]!=15){ repaint();return;} else{ if(Math.abs(last_downx-temp.x)==1&&last_downy-temp.y==0) { intdavid; david=map[last_downy][last_downx]; map[last_downy][last_downx]=15; map[temp.y][temp.x]=david; if(wingame()) able=false; repaint(); return; } elseif(last_downx-temp.x==0&&Math.abs(last_downy-temp.y)==1) { intdavid; david=map[last_downy][last_downx]; map[last_downy][last_downx]=15; map[temp.y][temp.x]=david; if(wingame()) able=false; repaint(); return; } else{repaint();return;} } } } } else{ Pointpoint; point=evt.getPoint(); if(point.x>30&&point.x<280&&point.y>50&&point.y<230) {able=true; initmap(2);} if(point.x>370&&point.x<620&&point.y>160&&point.y<340) {able=true;initmap(0);} if(point.x>60&&point.x<310&&point.y>270&&point.y<450) {able=true;initmap(1);} elsereturn; } } //转换坐标 publicPointgetarea(Pointpoint){ if(point.x>640||point.y>480) returnpoint; elsereturnpoint=newPoint(point.x/160,point.y/120); } //图片初始化 voidinitmap(intstage){ picture=createImage(width,height); buffer=picture.getGraphics(); buffer.drawImage(pic[stage],0,0,640,480,this); for(inta=0;a<15;a++) { off_pic[a]=createImage(width/4,height/4); off_buf[a]=off_pic[a].getGraphics(); off_buf[a].drawImage(picture,0,0,width/4,height/4, (a%4)*width/4,(a/4)*height/4,(a%4+1)*width/4,(a/4+1)*height/4,this); } initgame(); repaint(); } //程序是否结束 booleanwingame(){ for(inta=0;a<4;a++) for(intb=0;b<4;b++) { if(map[a][b]==a*4+b) ; elsereturnfalse; } returntrue; } //游戏初始化 voidinitgame(){ for(inta=0;a<4;a++) for(intb=0;b<4;b++) { if(!(a==3&&b==3)){ map[a][b]=(int)(Ma